How do I create a db link?
To create a private database link, you must have the CREATE DATABASE LINK system privilege. To create a public database link, you must have the CREATE PUBLIC DATABASE LINK system privilege. Also, you must have the CREATE SESSION system privilege on the remote Oracle database.
How do I find where a db link is used?
SELECT DBMS_METADATA. GET_DDL(object_type, object_name, owner) FROM all_OBJECTS WHERE (OWNER = ‘your schema name’); and then search in the result the pattern of the db_link, which looks like @dblink_name .
How do you check db link is active or not?
We can verify public database link using select * from dual@public_db_link; How private db links can be verified by a DBA if application schema’s password is not known.
How do I change a DB Link?
Oracle ALTER DATABASE LINK
- ALTER DATABASE LINK private_dblink CONNECT TO remote_user IDENTIFIED BY new_password;
- ALTER PUBLIC DATABASE LINK public_dblink CONNECT TO remote_user IDENTIFIED BY new_password;
- ALTER DATABASE LINK sales CONNECT TO bob IDENTIFIED BY xyz@123!;
Can we rename DB link in Oracle?
There are no supported solutions for renaming DB links in 12c without knowing the password.
What is public db Link?
A public database link is one that can be used by any user. A private database link can be used only by the database link’s owner. Specification of the PUBLIC option creates a public database link. If omitted, a private database link is created.
How do you check db link is active or not in Oracle?
What is a link in Oracle Database?
A database link is a pointer that defines a one-way communication path from an Oracle Database server to another database server. The link pointer is actually defined as an entry in a data dictionary table. To access the link, you must be connected to the local database that contains the data dictionary entry.
What is Global Link in Oracle Database?
Users and PL/SQL subprograms in any database can use a global link to access objects in the corresponding remote database. Note: In earlier releases of Oracle Database, a global database link referred to a database link that was registered with an Oracle Names server. The use of an Oracle Names server has been deprecated.
What characters can be used in dblink?
Use only ASCII characters for dblink. Multibyte characters are not supported. The database link name is case insensitive and is stored in uppercase ASCII characters. If you specify the database name as a quoted identifier, then the quotation marks are silently ignored.
How can I gain information about the links in the database?
You can use data dictionary tables and views to gain information about the links. This section contains the following topics: The following views show the database links that have been defined at the local database and stored in the data dictionary: